Here's an old architect's trick I learned looong ago. You know how, when you draw a long pencil line, the point flattens and the line thickens as you go? Well, to keep it thin – consistently thin – start with a sharp point, lean the pencil slightly and keep it sharp by "rolling" the pencil between your thumb and fingers as you draw. I've passed this tip forward to my design students and young assistants over the years and most tell me they're hooked on the habit. After just a few practice runs you'll have it mastered. Hope you like it.
Enjoy. Joel
Enjoy. Joel